Clamp



July. 6, 1926.

J. H. vEAsEY CLAMP Filed June 5, l924` Patented .lilly 6, 1912.6.

' sUNIIEDff STATES JHNJIERBERT vnAsnY, ,orfironarnmemmer, Lraiiitsvaiir.,` lsfcitr'iitArmen. l

' appneatiqn ined Jnne`5,- 1924. semaine. 71s,15'9.i

y The presentfinvention relates to fluid-v actuated clamps. An object Qi the invention is to 'provide a'simple and compact de` vice adapted to e'rect .simultaneously two clamping operations, such asfclarnpingfaY rock'drill toa saddle "and clamping the saddle to a supportingarmf .s

4In the accompanying drawingsFig; I is a vertical sectionv of a'f'roclv drill clamp .according to this invention.

Fig. n is a pian, sectioned@ irr in' Fig. 1. v

For gripping vthearm 1V there are provided the two` jaws 6, 7 having arcuate inner surnels 10 formed in the head vtransversely to `faces to seat on the arm 1. -Thetoot 3 isl seated inla' head 8.,v yTwo removable plates Qare engaged in chani' the axis of the foot 3. Said jaw plates have internal conical gripping surfaces 11 which, when the jaw plates are slid 1n place as shown, engage theconicalfsurtace `4' of the i foot and retain the footl in the head. 'The jaw plates are retained in positionby the pins 12 passed into Vplace behindV them. One

movable Vjaw platek only. maybel employed,

the other being made "integral` with the v head; but the use of'two (or more) movable jaws 'has-the advantage thata heavy body such as' a rock drill can be droppedv directly Vinto the position on the headin which it is to be clamped. A plunger jaw 13 extendsy Athrough an lopening 14 in the head coaXially with the -foot 3 to enga-ge the base .of vthe q foot. The foot is secured by lforcing said plunger jaw. 13 .and the jaw surfaces 11v towards one another. t t

VThe jaw movement is derived fromV the pressure members '15, 16 which are forced apart by fluid pressure between-them. Said l*membershave to bek of considerable area to give theA requisite Vclamping pressure with the fluid pressure ordinarily available, such as the pressure of the water or compressed air used in Vmines in connection with rock drilling. In ,order to provide the necessary Varea without excessive weight, said members, 15 and lGare conveniently somewhat y thin inetat discs.v space or Vchamber 16a :between them' is enclosed :peripherally `by' an Aannularmember"which may be av loose'` ring V17,- (Figt I)` having end*flanges 18 'for retaininggitin yassembly, with the ldiscsvl', Y. 16.` 'Saidy annular m'ember'inay also Abe. an

annulartiangeflfa'fixed with respect tjofv one '('gffthev discsik say 15, asffshown-inlFiggflII, i'orming with said disc acylinder#infwhich the'other disc 16 functions as a 'is-tons vSuch s when*` the rockdril'l initsA usual'fposition above the arm' 'l1,fto avoid: the collection: 'of dirt in it. *In anothe'i'f zniodiiication,ev Fig.

' a cylinder ispreferablydirecte downwards IV, both discs 15 and 16 areprovidedjwith Overlapping- -flimgeg ,17125.Y

A short separating movement of 'the 'discs i' 15'v and '16 being' allthatf is necessary, the

fluid for forcingthem apart-isconveniently retained in f a' flexible bag 19" which -is `en"- 'clos'ed and Asupported over` vsubstantially 'its whole'a'rea by the members 15",` 16, 17 -Said bag may-be jointed witlr-they'fluid Vinlet y y soclietrQ() byl'formingfoirit. a'tubular eX'- tension 21fwhich seats?withinsaid'gsocket. i Holes "29;- 'formed in the; 'lattfefrfpermit the 'esf cape or'v any: pressure "fluid-which may find Vits way between the outer-*surface'of the extension and the socket, thus maintaining latmosph'eric' pressure between the .eatension v 21and'the"inner wall vv,of the-socketfwhereby the lhigher pressure of the Afluid Awithin the.

extensionlholds the latter iniui'dtight coni .tact :Wahine fseek-t. 'Y 'other nieansffforrei taining the fluid: may" however beV used, such as the cup'leathers 23-in ythe' piston and cylinder construction of Fig. III.

The :relative movement r of the discs 15,

1.6 is transmitted tothe opposite `jaw members in anyv suitable manner.` In the (Fig.l I

construction' the-jaw GisA seated on and `preferably made 'integral with or li'xed to,

the disc 15. TheV plunger jaw 13and the -jaw 7 aremade in one piece; and the head V8 is moved relatively to them, from Vthe disc 16, by'fpillars comprising bolts 24 Aand distance sleeves 25 which secure the head 8 and disc 16 rigidly together.

In the modified construction of V the'luid pressure container is interposed'between lthe arm jaw and the plungerjawy j 1,3. Y The pillars 2&1-, 25 connectthe head v8 .l

to a yoke 26 associated with the jaw 6.1

For maintaining parallelism between the v discs, 15, 16 the pillars'24,"25nare utilized .y fixed to theV disc or Vdiscs to be guided. In the Fig.kk I construction as the pillars 2li as guides on which Vslide sleeves 2,7Y rigidly are intended -t'nbe-rigidlyhixed to the disc 16` the disc 15 is provided witlirguide sleeves 27.' In the-Fig. V construction both disc's'' and 16 being" movable relatively *tov pillars 24, 25 are each provided with guide sleeves indeaterl pv .27 and 27- Y Compactness and strength is attained by errang-'insite pllarsel, 25. Wthinthe peyripleraer the dises '15, 16 and elese te the jaws, 7. In both the Fig. I and Fig. V eenstrnptipnsfthe pillars `estelarl at sash ,end beyond-the jawsv, v7; and long,` guiding' sur- Yaeessubstantially `equal-- te the heialre el' saidiaws 6, 7,.,are thas available to prevent relative tilt-,ing Aof the dises, l5, 16 as they arelfereed apart,

Eheqjaw member ,frernffallingept et nlaee when itis Yseparated from .the arm fl ley renneetpe'. .it te elle jaw6bvlppselv fitting ClOWe-ls 28,-

1. In a clfmp7 clamping laws, rpressure members aeseeated with` the jar-vs, means between tl'lpressure. members to receive fluid pressure ferjrela,tlvelv leerme .sale raars,

' pillars extending' in the'dreetep 0f prerement aasiiserving ytetransrrlt pressure UQ the dans, said. pillars reina` sldalple through the.

pressure members,- and -sleevesrigridly conteeeteelte the pressure members sldable 011. said-pillars for maintaining parallelism leetween the-pressure members, said sleeves beins slrlable in eppesite direeteas, with respeetre vearll ether,l

ile a elarpp, elampee' jaws, pressure members hav-ips. bet-Ween there Y a spare,

Vmeans in the space adapted to receive fluid pressure `for relatively ,movies said jaws pillars pestenedwlthn the periphery e said pressure members apslererrdins tra-11S,-A verselrresale-resellers fe transmit pressare 7,' y1 3 maybe retained to the jawsband sleeves slidableinopposite members for maintaining parallelism between the )ressure members andmeansv slidable von'said members` to enclose said space.

n Y s. In ak clamp, a pairfoiz' opposed ]aws, pressure members Vhaving` between them a space, flexible means in the space to receive fluid pressure Afor relatively moving said Jawsg one ,of said-pressure members acting directly on a yaw, pillars transmitting pres- Y directions on said pillarsV and connected to sure 'tothe other and extending past through., the head and opposing said conical Jaw means and forming therewith a second pair ofjaws, and fluid actuated means ar- V ranged.for forcing the members of said severalY pairs towards one another,

5, la a slamp, a head, 'eenieal 'i'av means removably held therein, the head being adapted to receive a conical member ywhen the jaw'means are removed, and said conical jaw means when inposition engaging the conical .face of the member, r'pins extending through the head to form Van' abutment for the jaws te'retaiasairlmember, a, plusser working through the head to engage `the base of the conical vnfieniber andineans to force saidplunger towards the conical jaw means.

In ltestimony whereof I aliir; my signature.

.man nnaerarfveasnrl i esV 

